▎ 摘　　要

NOVELTY - Improving industrial wastewater biochemical treatment involves using nano magnetic powder-iron powder/graphene oxide composite carrier obtained by mixing raphene oxide and magnetic powder with 80-100 nm particle size, and iron powder with 50-100 nm particle size in 1:15:5-1:30:10 ratio, mixing, adding into the beaker, adding deionized water in 1:1000 ratio, placing the beaker in an oil bath at 50-200 degrees C temperature, and vigorously stirring for 2-4 hours, then ultrasonic dispersing at room temperature for 20-60 minutes, and finally drying in vacuum drying oven at 80-120 degrees C temperature to obtain carrier having 0.3-0.6 micron particle size. The aerobic sludge system for industrial wastewater treatment has an influent 500-1500 mg/L common chemical oxygen demand, and is added in accordance with biological oxygen demand5:nitrogen:phosphorus=100:5:1, followed by adding ammonium sulfate and disodium phosphate, monopotassium phosphate with a trace of magnesium sulfate and calcium chloride. USE - Method used for improving industrial wastewater biochemical treatment (claimed). ADVANTAGE - The method offers synergistic effect, promotes microbial growth and metabolism and energy production, eliminates nano-scaled material for inhibition of microbial growth and metabolism, effectively improves the processing efficiency, shortens processing time, recycles composite carrier, and saves cost. DETAILED DESCRIPTION - Improving industrial wastewater biochemical treatment involves using nano magnetic powder-iron powder/graphene oxide composite carrier obtained by mixing raphene oxide and magnetic powder with 80-100 nm particle size, and iron powder with 50-100 nm particle size in 1:15:5-1:30:10 ratio, mixing, adding into the beaker, adding deionized water in 1:1000 ratio, placing the beaker in an oil bath at 50-200 degrees C temperature, and vigorously stirring for 2-4 hours, then ultrasonic dispersing at room temperature for 20-60 minutes, and finally drying in vacuum drying oven at 80-120 degrees C temperature to obtain carrier having 0.3-0.6 micron particle size. The aerobic sludge system for industrial wastewater treatment has an influent 500-1500 mg/L common chemical oxygen demand, and is added in accordance with biological oxygen demand5:nitrogen:phosphorus=100:5:1, followed by adding ammonium sulfate and disodium phosphate, monopotassium phosphate with a trace of magnesium sulfate and calcium chloride, controlling 6.5-8.5 pH, 2-4 mg/L dissolved oxygen concentration and 10-30 degrees C temperature, 3-5 g/L mixed liquor suspended solids, 4-6 hours hydraulic retention time. The industrial wastewater treatment hydrolysis acidification system contains influent 1500-6000 mg/L common chemical oxygen demand, biological oxygen demand5:nitrogen:phosphorus=200:5:1, followed by adding ammonium sulfate and disodium phosphate, monopotassium phosphate with a trace of magnesium sulfate and calcium chloride, controlling 6-7 pH, 0.2-0.5 mg/L dissolved oxygen concentration and 10-30 degrees C temperature, 4-8 g/L mixed liquor suspended solids, 6-10 hours hydraulic retention time. The industrial wastewater treatment biogas fermentation system contains influent 3000-10000 mg/L common chemical oxygen demand, biological oxygen demand5:nitrogen:phosphorus=200:5:1, followed by adding ammonium sulfate and disodium phosphate, monopotassium phosphate with a trace of magnesium sulfate and calcium chloride, controlling 6.7-7.5 pH, less than 0.2 mg/L dissolved oxygen concentration and 35-40 degrees C temperature, 6-10 g/L mixed liquor suspended solids, 6-12 hours hydraulic retention time. The 1mL/L trace element solution is added with waste water containing composition as 1.5 g-L-1 ferric chloride hexahydrate, 0.15g-L-1 boric acid, 0.03 g-L-1 copper sulfate pentahydrate, 0.03 g/asteriskL-1 potassium iodide, 0.10 g/asteriskL-1 manganese sulfate monohydrate, 0.065 g-L-1 ammonium heptamolybdate tetrahydrate, 0.057g-L-1 zinc chloride, 0.15 g-L-1 cobaltous chloride hexahydrate and 0.15 g/asteriskL-1 nickel nitrate hexahydrate. The carrier is added to the aerobic sludge system in 0.005-0.02 ratio having more than 5g/L mixed liquor suspended solids. The excess sludge is recovered by magnetic recovery device nano-magnetic powder-iron powder/graphite oxide. The olefin composite carrier is reused in the aerobic sludge system and supplemented with the nano magnetic powder-iron powder/graphene oxide composite carrier to adjust 0.005-0.02 mass ratio of the nano magnetic powder-iron powder/graphene oxide composite carrier to the sludge. The carrier is added to the hydrolysis and acidification system sludge in 0.02-0.05 ratio, when more than 8g/L mixed liquor suspended solids. The mud is discharged, and the excess sludge is recovered by a magnetic recovery device, nano-magnetic powder-iron powder/graphene oxide composite carrier, recycled to the hydrolysis acidification system, and supplemented with nano-magnetic powder-iron powder to adjust 0.02-0.05 mass ratio of nano-magnetic powder-iron powder/graphene oxide composite carrier and sludge. The carrier is added to theanaerobic biogas fermentation system sludge in 0.02-0.05 ratio, when more than 10g/L mixed liquor suspended solids. The mud is discharged, and the excess sludge is recovered by a magnetic recovery device, nano-magnetic powder-iron powder/graphene oxide composite carrier, recycled to the hydrolysis acidification system, and supplemented with nano-magnetic powder-iron powder to adjust 0.02-0.05 mass ratio of nano-magnetic powder-iron powder/graphene oxide composite carrier and sludge.